Everyone has those nights-you lie in your bed for hours, tossing and turning, totally unable to fall asleep. You wish you could just turn your brain off as if it were a light. That would make things much easier, wouldn’t it?
Now it looks like you are one step closer to this wild dream of yours-scientists from Oxford University, UK have just discovered the “switch” that tells the brain to go to sleep, reported Forbes.
To understand the study, you first need to know that there are two mechanisms(机能) that regulate sleep. There’s one that we’re already familiar with —our body clock, which works in a 24-hour cycle based on the light changes throughout the day.
The other one is what scientists call the sleep “homeostat(动态平衡系统)”. This mechanism has nothing to do with daylight. Instead, it keeps track of the brain’s waking hours and urges it to rest if it has been awake for a long time. “It is similar to the thermostat(自动调温器) in your home. A thermostat measures temperature and switches on the heating if it’s too cold,” Professor Gero Miesenbock, who led the study, told The Telegraph.
Our bodies use both of the mechanisms to regulate sleep. “The body clock says it’s the right time, and the sleep thermostat has built up pressure during a long waking day,” explained Miesenbock.
There is no way that scientists can trick the body clock. But with the sleep homeostat, there might be something they can do.
The researchers found that the sleep homeostat works by activating a specific group of nerve cells, or neurons, in the brain. They tested their theory on fruit flies by removing the neurons from the insects’ brains. And as expected, they found that the flies without the homeostat neurons did not keep a regular sleep pattern anymore.
Now that scientists have pinpointed the exact place in the brain— or, the “switch”—that regulates sleep, they can begin investigating how to activate these cells at any given time so that people can be sent to sleep instantly.
More importantly, figuring out how sleep mechanisms work may also help us to one day unravel one of the oldest mysteries of all: why do we need to sleep in the first place?
1.What is the article mainly about?
A. A new way to treat sleep disorders.
B. The discovery of the sleep “homeostat”
C. Advice on what to do when you fail to fall asleep.
D. A comparison of the two mechanisms that regulate sleep.
2.How does the author explain the function of the sleep homeostat?
A. Through examples.
B. With comparisons.
C. Through cause and effect analysis.
D. By presenting research findings.
3.What can we conclude from the article?
A. Generally, the sleep homeostat has less effect on people during the day than at night.
B. There is little scientists can do to affect the way the sleep homeostat works.
C. What makes us go to sleep at night is probably a combination of the two mechanisms.
D. The more homeostat neurons there are in one’s brain, the more easily one can fall asleep.
4.The underlined word “unravel” in the last paragraph is closest in meaning to .
A. put up with B. figure out
C. keep track of D. take notice of
高三英语阅读理解困难题
Everyone has those nights-you lie in your bed for hours, tossing and turning, totally unable to fall asleep. You wish you could just turn your brain off as if it were a light. That would make things much easier, wouldn’t it?
Now it looks like you are one step closer to this wild dream of yours-scientists from Oxford University, UK have just discovered the “switch” that tells the brain to go to sleep, reported Forbes.
To understand the study, you first need to know that there are two mechanisms(机能) that regulate sleep. There’s one that we’re already familiar with —our body clock, which works in a 24-hour cycle based on the light changes throughout the day.
The other one is what scientists call the sleep “homeostat(动态平衡系统)”. This mechanism has nothing to do with daylight. Instead, it keeps track of the brain’s waking hours and urges it to rest if it has been awake for a long time. “It is similar to the thermostat(自动调温器) in your home. A thermostat measures temperature and switches on the heating if it’s too cold,” Professor Gero Miesenbock, who led the study, told The Telegraph.
Our bodies use both of the mechanisms to regulate sleep. “The body clock says it’s the right time, and the sleep thermostat has built up pressure during a long waking day,” explained Miesenbock.
There is no way that scientists can trick the body clock. But with the sleep homeostat, there might be something they can do.
The researchers found that the sleep homeostat works by activating a specific group of nerve cells, or neurons, in the brain. They tested their theory on fruit flies by removing the neurons from the insects’ brains. And as expected, they found that the flies without the homeostat neurons did not keep a regular sleep pattern anymore.
Now that scientists have pinpointed the exact place in the brain— or, the “switch”—that regulates sleep, they can begin investigating how to activate these cells at any given time so that people can be sent to sleep instantly.
More importantly, figuring out how sleep mechanisms work may also help us to one day unravel one of the oldest mysteries of all: why do we need to sleep in the first place?
1.What is the article mainly about?
A. A new way to treat sleep disorders.
B. The discovery of the sleep “homeostat”
C. Advice on what to do when you fail to fall asleep.
D. A comparison of the two mechanisms that regulate sleep.
2.How does the author explain the function of the sleep homeostat?
A. Through examples.
B. With comparisons.
C. Through cause and effect analysis.
D. By presenting research findings.
3.What can we conclude from the article?
A. Generally, the sleep homeostat has less effect on people during the day than at night.
B. There is little scientists can do to affect the way the sleep homeostat works.
C. What makes us go to sleep at night is probably a combination of the two mechanisms.
D. The more homeostat neurons there are in one’s brain, the more easily one can fall asleep.
4.The underlined word “unravel” in the last paragraph is closest in meaning to .
A. put up with B. figure out
C. keep track of D. take notice of
高三英语阅读理解困难题查看答案及解析
EVERYONE has those nights – you lie in your bed for hours, tossing and turning, totally unable to fall asleep. You wish you could just turn your brain off as if it were a light. That would make things much easier, wouldn’t it?
Now it looks like you are one step closer to this wild dream of yours – scientists from Oxford University, UK have just discovered the “switch” that tells the brain to go to sleep, reported Forbes.
To understand the study, you first need to know that there are two mechanisms (机能) that regulate sleep. There’s one that we’re already familiar with – our body clock, which works in a 24-hour cycle based on the light changes throughout the day.
The other one is what scientists call the sleep “homeostat (动态平衡系统)”. This mechanism has nothing to do with daylight. Instead, it keeps track of the brain’s waking hours and urges it to rest if it has been awake for a long time. “It is similar to the thermostat (自动调温器) in your home. A thermostat measures temperature and switches on the heating if it’s too cold,” Professor Gero Miesenböck, who led the study, told The Telegraph.
Our bodies use both of the mechanisms to regulate sleep. “The body clock says it’s the right time, and the sleep thermostat has built up pressure during a long waking day,” explained Miesenböck.
There is no way that scientists can trick the body clock. But with the sleep homeostat, there might be something they can do.
The researchers found that the sleep homeostat works by activating a specific group of nerve cells, or neurons, in the brain. They tested their theory on fruit flies by removing the neurons from the insects’ brains. And as expected, they found that the flies without the homeostat neurons did not keep a regular sleep pattern anymore.
Now that scientists have pinpointed (定位) the exact place in the brain – or, the “switch” – that regulates sleep, they can begin investigating (研究) how to activate these cells at any given time so that people can be sent to sleep instantly.
More importantly, figuring out how sleep mechanisms work may also help us to one day unravel one of the oldest mysteries of all: why do we need to sleep in the first place?
1.What is the article mainly about?
A. A new way to treat sleep disorders.
B. The discovery of the sleep “homeostat”.
C. Advice on what to do when you fail to fall asleep.
D. A comparison of the two mechanisms that regulate sleep.
2.How does the author explain the function of the sleep homeostat?
A. Through examples.
B. With comparisons.
C. Through cause and effect analysis.
D. By presenting research findings.
3.What can we conclude from the article?
A. Generally, the sleep homeostat has less effect on people during the day than at night.
B. There is little scientists can do to affect the way the sleep homeostat works.
C. What makes us go to sleep at night is probably a combination of the two mechanisms.
D. The more homeostat neurons there are in one’s brain, the more easily one can fall asleep.
4.The underlined word “unravel” in the last paragraph is closest in meaning to ______.
A. put up with B. figure out C. keep track of D. take notice of
高三英语阅读理解中等难度题查看答案及解析
A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off(打瞌睡)—if it is milked from a cow at night.
Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven to help people feel sleepy and reduce anxiety(焦虑).The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder(奶粉) made from cows milked both during the day and at night. Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.
Night milk quickened the start of sleep and caused the mice to sleep longer.
While the effect of cow milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who have trouble falling asleep at night.
Previous (以前的)studies have also showed that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.
1.According to the text, the mice fed with daytime milk_______.
A.started sleep more easily B.were more anxious
C.were less active D.woke up later
2.Which of the following is true of melatonin according to the text?
A.It’s been tested on mice for ten years.
B.It can make people more energetic.
C.It exists in milk in great amount.
D.It’s used in sleeping drugs.
3.What can be a suitable title for the text?
A.Night Milk and Sleep B.Fat Sugar and Health
C.An Experiment on Mice D.Milk Drinking and Health
4.How does the author support the theme of the text?
A.By giving examples.
B.By stating arguments.
C.By explaining statistical data.
D.By providing research results.
高三英语阅读理解简单题查看答案及解析
A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.
Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.
The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.
Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.
Night milk quickened the start of sleep and caused the mice to sleep longer.
While the effect of cows milk harvested at different times has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.
Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.
Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.
1.According to the text, the mice fed with daytime milk ________.
A. started sleep more easily B. were less active
C. were more anxious D. woke up later
2.Which of the following is TRUE of melatonin according to the text?
A. It’s used in sleeping drugs.
B. It exists in milk in great amount.
C. It can make people more energetic.
D. It’s been tested on mice for ten years.
3.What can be a suitable title for the text?
A. Milk Drinking and Health
B. Fat, Sugar and Health
C. An Experiment on Mice
D. Night Milk and Sleep
4.How does the author support the theme of the text?
A. By giving examples.
B. By providing research results.
C. By explaining statistical data.
D. By stating arguments
高三英语阅读理解中等难度题查看答案及解析
阅读理解。
A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.
Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.
The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.
Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.
Night milk quickened the start of sleep and caused the mice to sleep longer.
While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.
Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.
Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.
1.According to the text, the mice fed with daytime milk_______.
A. started sleep more easily B. were more anxious
C. were less active D. woke up later
2.Which of the following is true of melatonin according to the text?
A. It’s been tested on mice for ten years
B. It can make people more energetic
C. It exists in milk in great amount
D. It’s used in sleeping drugs
3.What can be a suitable title for the text?
A. Night Milk and Sleep B. Fat Sugar and Health
C. An Experiment on Mice D. Milk Drinking and Health
4.How does the author support the theme of the text?
A. By giving examples.
B. By stating arguments.
C. By explaining statistical data.
D. By providing research results.
高三英语阅读理解中等难度题查看答案及解析
Did Jack take the doctor’s advice that he ________ in bed for a couple of days?
A. lies B. lay C. lie D. laid
高三英语单项填空中等难度题查看答案及解析
Did Jack take the doctor’s advice that he ________ in bed for a couple of days?
A. lies B. lay C. lie D. laid
高三英语单项填空中等难度题查看答案及解析
For her, happiness ________ helping those in trouble.
A.consists of | B.consists in | C.makes up | D.lie in |
高三英语单项填空中等难度题查看答案及解析
Most nights I lie in bed, ready for an escape from myself, yet a streaming video of everything I ate, how I exercised, the activities of the day won’t stop playing in my mind.
I pause. I breathe. I try to relax once again, but it doesn’t work.
When I’m not exercising — even if I’ve already exercised that day — I’m consumed with anxiety about my next workout. Will something come up and make me miss the gym? What about holidays when the gym is closed?
Exercise has become a disease; it even disguises (伪装,假装) itself as the cure. If I don’t have it as an escape, then what’s left to hold me together? Working out feels like the only way to calm myself, but as soon as I leave the gym or finish a walk, the whole cycle starts over again.
As you might have guessed by now, I suffer from depression and OCD (强迫症). I’m a highly-educated adult woman who knows the risks of this behavior, and yet I can’t stop.
As a society, we’re told over and over that it’s important to exercise. That’s what makes it so easy to keep this addiction a secret; it’s not as obvious as lighting up a cigarette. You can continue to feed your addiction under the guise that you’re just being “healthy”. I not only have to fight the nonstop thoughts in my head but also the “more exercise is better” messages I receive from the media every day.
For me, exercise has become a drug, which is a way to numb the pain I might feel. I wonder what it would be like to “have the problem” of not wanting to go to the gym. It still feels very far away.
Yet I know I can be stronger than this. I can break the cycle I’m in. I can tell my story so as to give up a piece of the secrecy that keeps me sick.
Because no, you don’t want my problem. And finally, neither do I.
1.When the author goes to bed, she___________.
A. can’t breathe normally B. can’t fall asleep
C. always feels hungry D. always feels tired
2.The underlined word “it” in paragraph 4 probably refers to ___________.
A. the gym B. disease C. exercise D. the cure
3. What is special about the addition to exercise?
A. It is popular among highly-educated people.
B. It is widely reported by the mass media.
C. It does little harm to health.
D. it is not easily discovered.
4.We know from the text that the author ____________.
A. is emotionless
B. lives far away from the gym
C. is seriously ill
D. has difficulty in keeping secrets
高三英语阅读理解困难题查看答案及解析
195. Frank was absent from school this morning. He _____ in bed for the whole morning.
A.lied | B.laid | C.lay | D.Lain |
高三英语单项填空简单题查看答案及解析